Friendship is what you choose, just because you hand out with someone doesn’t make you friends. The speaker said he never thought of them as friends before. He only thinks of as a friend to be there until one moves, a good friend would stay friends no matter what anyone thinks. Just because one moves doesn’t mean it’s over. Saying your friends until one leaves isn’t friendship that’s companionship, partnership. What if Arlo thought they were great friends and expects them to stay in contact even on opposite sides of the world. Second-string quarterback refers to someone or something that serves as a backup for the top choice. Lateral means to throw a football sideways or backward.